Your responsibilities will include, but are not limited to: Starting, operating, repairing and maintaining various types of heating and air conditioning, plumbing, carpentry, locksmith, electrical and other building related systems equipment. In accordance with local laws and ordinances, you must have and maintain a valid refrigeration license and must be able to pass, obtain and keep current a certificate of fitness for one or all of the following: oil burner, fire standpipe, sprinkler, and air compressor operations.